Re: [Mesa3d-users] undefined symbol in egl/egl_x11_swrast.so and init problems

[Chia-I Wu <ol...@gm...>]

On Thu, Mar 11, 2010 at 10:06 PM, Andreas Pokorny
<and...@gm...> wrote:
> Hi,
>
> I work on: b8656c4825b9e054f05258773ba012e41d4fcdee
>
> I have two rather strange problems using egl. I have implemented a
> egl/es2/libX11 based renderer shared object file. The shared object
> file gets loaded and initialized using dlopen/dlsym. Then when the
> renderer is supposed to initialize EGL, and to create a window I run
> into runtime symbol lookup errors.
>
> ./Startup: symbol lookup error: /usr/local/lib/egl/egl_x11_swrast.so:
> undefined symbol: _eglInitDriverFallbacks
It seems _eglInitDriverFallbacks in libEGL.so is not resolved when
egl_x11_swrast.so is loaded.  I am not quite sure about your setup (who dlopen
who?).  Do you have a sample code that reproduces your setup or the issue?
> When I add the following to the makefiles - it seems to work.
>
> --- a/src/gallium/winsys/drm/swrast/egl/Makefile
> +++ b/src/gallium/winsys/drm/swrast/egl/Makefile
> @@ -3,7 +3,7 @@ include $(TOP)/configs/current
>
>  EGL_DRIVER_NAME = swrast
>  EGL_DRIVER_SOURCES = dummy.c
> -EGL_DRIVER_LIBS =
> +EGL_DRIVER_LIBS = -lEGL
>
>  EGL_DRIVER_PIPES = \
>        $(TOP)/src/gallium/winsys/drm/swrast/core/libswrastdrm.a \
>
> Then the eglInitialize() command still fails because of something else.
>
> When I run the application with the following settings:
> EGL_DRIVER=egl_x11_swrast
> EGL_SOFTWARE=1
> EGL_DISPLAY=x11
> EGL_LOG_LEVEL=debug
>
> I get:
>
> libEGL debug: dlopen(/usr/local/lib/egl/egl_x11_swrast.so)
> libEGL info: use software fallback
> libEGL warning: No supported client API
> libEGL debug: no state tracker supports config 0x21
> ... till ...
> libEGL debug: no state tracker supports config 0x98
> libEGL debug: EGL user error 0x3001 (other) in eglInitialize(unable to
> add configs)
> The demos in mesa/progs/egl give me the same output. While the demos
> in mesa/progs/{es2,es1}/xegl and work. Any ideas what I am doing
> wrong?
>From which directory do you build your libGL?  You need to use the one from
src/gallium/winsys/xlib (or src/gallium/targets/libgl-xlib/ in today's git).
Have a look at the OpenGL section in docs/egl.html.

-- 
olv@LunarG.com